@Article{, title={The effect of accelerated artificial aging on color change of three different types of composite (in vitro study)}, author={Dr. Zainab Shaker Al-Taii, B.D.S, M.Sc.* د. زينب شاكر}, journal={MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان}, volume={15}, number={1}, pages={9-17}, year={2018}, abstract={The greater demand for esthetic in the modern life with the simplified bondingsteps for composite filling increase its universal use but their gradual change incolor over time make their replacement very important, the aim of this study is thecomparison among different type of composite to see which type is the best colorstability in the clinical work .Material and method :30 samples of three different materials have been made ,thefirst group is 10 samples fabricated from Filtek z250 ,the second group is 10samples fabricated from Filtek z250xt and the third group is 10 samples fabricatedfrom z350xt .All the samples color parameters were measured before placing inaccelerated weathering tester (time 0)then all the samples were placed in theaccelerated weathering tester for 150 h and 300h then the color parameters weremeasured from which the change in color had been measured. Statistical analysiswas performed by using ANOVA repeated measure test to see if there were anysignificant difference among the ΔE of experimental groupsResults : the results show that the z250 have the highest color stability as comparedwith other types of composite used in this study while the z350xt results show thelowest color stability also the result show that there's high significant differenceamong all groups among different time interval used in the studyConclusion: the change in color above the clinically acceptable threshold (3.3) wasseen in all types of composite used in this study and that the z 250xt shows theleast change in color.

} }